Well.....me!!
It's the same thing around here...blue bikes are the last to move. My dealer didn't even ask for a blue SESG for 2010. Took another Spiced Rum instead. Go figure. But he's right. I put my red '08 Street Glide on consignment with my dealer to buy my SESG...it stayed on the floor a grand total of 3 days before it was scarfed up. I got what I was asking for it too. Another guy put an '07 blue Street Glide on consignment with them about two weeks after mine sold, and it's still sitting on the floor. I didn't do a lot to my SG to make it any different from this guy's SG, other than his is blue. Go figure.... 

I think all the SESG colors are sharp. Foolish or not I don't really care about what other peoples preference might be on this thing when I'm done with it. The last thing this machine is, is an investment for good monetary capital. It's for enjoyment. Get away from that and I think you miss the point.
I make moderate decisions with my home that way, because it is that type of an investment where I need to make decisions that fit a criteria where changes are cost effective, beneficial to me and my family, and appealing to a broad range of buyers. When I do the work myself and am frugal about tools and materials I get to enjoy the benefits of the remodeling and usually make a profit. Not the same thing with a machine that depreciates the day you buy it.
My plan for now is to keep this bike. Maybe it will stay in the family, but I have no plans to trade it in later/ever.